One thing for absolutely everyone to bear in mind, that decides to give this a shot, is never ever face a window or a tv you really like KBs can slip, nore so when people do mid-air changeovers which we don't have in this but it can still happen.

Chalk is good because after so many minutes the handle will get slippery and grip may give.

Keep those shoulders retracted, so that the KB is not pulling the shoulder forward.

And, most importantly, pack that shoulder into the socket when the KB reaches it's overhead position; don't let the arm flop about left to right, back to front when it hits final position...stop it dead, the best way to keep those shoulders safe. Obviously with a lighter KB not so much of a concern but good technique at the start will put you in good stead for the heavier KBs to come, should you go that route.